4irw

Co-crystallization of streptavidin-biotin complex with a lanthanide-ligand complex gives rise to a novel crystal form

Method: X-RAY DIFFRACTION Dmax: 55.5 Å Quality: EXCELLENT

1. Protein Identity and Related Structures Protein Identity & Related Structures

Streptavidin

Streptomyces avidinii

UniProt P22629

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein homooligomer Homooligomer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain A; UniProt 36–163 Fragment:UNP residues 36-163 PDC PYRIDINE-2,6-DICARBOXYLIC ACID × 48 BTN BIOTIN × 4 TB TERBIUM(III) ION × 20 NA SODIUM ION × 4 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 8;298 K;1.5 uL protein (pH 8.0) incubated with saturated biotin solution + 1.5 uL 200 mM Na3[Tb(Dpa)3] + 3 uL 60% v/v MPD, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 1.40 Å R-free 0.154

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

312 other PDB entries and 368 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name SAV_STRAV
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 2–129; UniProt 36–163

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

SAXS profile for 4irw

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 4irw
Download Download

2. Structure Basics 2. Structure Basics

Entry ID entry_id4irw
Deposition date deposition_date2013-01-15
Structure title titleCo-crystallization of streptavidin-biotin complex with a lanthanide-ligand complex gives rise to a novel crystal form
Keywords keywordsbeta barrel, BIOTIN BINDING PROTEIN; BIOTIN BINDING PROTEIN
Experimental Method methodX-RAY DIFFRACTION

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier17.20
Radius of gyration Rg (electron density) rg_electron15.84
Forward intensity I(0) i06062260.00
Molecular weight molecular_weight15696.0 kDa
Excluded volume excluded_volume18341 ų
Envelope volume envelope_volume22032 ų
Hydration-shell volume shell_volume12322 ų
Envelope diameter envelope_diameter54.6
Shell Rg shell_rg21.01
Envelope Rg envelope_rg16.39
Shape Rg shape_rg15.68
Total Rg total_rg17.08
Total atoms total_atoms1961
Residues n_residues123
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax55.5
Rg (real space) rg_real17.17
Rg uncertainty (real space) rg_real_error0.31
I(0) (real space) i0_real6.0620e+06
I(0) uncertainty (real space) i0_real_error7.0310e+04
Rg (reciprocal space) rg_reciprocal17.18
I(0) (reciprocal space) i0_reciprocal6062000.0000
Solution quality estimate total_estimate0.9003
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary18.2
Skewness Skewness skewness0.233
Kurtosis Kurtosis kurtosis-0.451
Angular range angular_range— – 0.4650 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha420700.0000
Real-space data points n_real_points77
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.905; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.994; Smooth: 0.990

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (6)

7. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd4irwa1
Class classb — All beta proteins
Fold Fold foldb.61 — Streptavidin-like
Superfamily Superfamily superfamilyb.61.1 — Avidin/streptavidin
Family Family familyb.61.1.1 — Avidin/streptavidin
Domain ID domain_idd4irwa2
Class classl — Artifacts
Fold Fold foldl.1 — Tags
Superfamily Superfamily superfamilyl.1.1 — Tags
Family Family familyl.1.1.1 — Tags

CATH v4.4 (1 domains)

Domain ID domain_id4irwA00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily30 — Avidin-like

8. Citations (1)

9. Files and Curves (10)